Electric regulation.



J. L. CREVELING.

ELECTRIC REGULATION.

APPLICATION FILED MAY 6. 1911.

Patented Oct. 5, 19L).

l/Vl/ENTOH WITNESSES UNITED STATES PATENT. orrroE.

JOHN L. CREVELING, OF NEW N. Y., ASSTGNOR TO SAFETY CAR HEATING AND LIGHTING COMPANY, A CORPORATION OF NEW J EBSEY.

ELECTRIC REGULATION.

To all whom it may concern: I

Be it known that I, JOHN L. CREVELING, a resident of New York, in the county and State of New York, have invented certain new and useful Improvements in Electric Regulation, as set forth in the annexed specification and drawing, forming a. part thereof.

Myinvention pertains to that class of elec tricregulation wherein a dynamo or generator is automatically governed under varying conditions and has for its particular ObJBOt to provide means whereby certain fluctuations in e, output apt to take place in such automatic systems may be avoided.

The drawing illustrates one type of sys- 'tem embodying the essentials of my invention. a

In said drawing 1 represents a dynamo or generator provided with the usual field coil 2 land from which the positive lead 3 is cardevice 18, having one terminal connected as ried to the positive side of the storage battery 4 and lamps or other translating devices 5. The negative terminals of the translating devices are carried to the lead 6 in communication with the negative side of the storage battery 4 and connected with the negative brushof the generator through solenoids 7 and 8, the functions of which will hereinafter appear. The field 2 is governed by the carbon pile 9 which is controlled as by the lever 10 normally drawn upwardly. by the adjustable spring 11 in such manner as to compact the carbons 9 and .reduce the resistance thereof. The lever 10 is provided at one extremity with a magby wire19 with the lead 3.

20 is aratchet carried upon the shaft 21 which shaft also carries the lever 22 normally drawn in an upward direction against the stop-screw 24. The lever 22 is provided at one extremity with the core 25 so disposed with regards the solenoid ,7 thatexcitation Specification of Letters Patent.

Application filed May 6, 1911.

Serial No. 625,517.

normally drawn upwardly as by the adjustable spring 30 against the ad ustable stop 31. The levers 10 and 22 may beprovided with dash-pots 32 so as to resist too sudden movement.

IThe'operation of my invention is substan- Patented Oct. 5, 1915.

tially as follows: Starting with the various instrumentalities in the positions indicated in the drawing and the generator running at such speed and its voltage such as to cause it to have substantially no output and at.. the' same time substantially no back discharge from the battery,'then no appreciable current will be flowing to or from the generator. If the speed be increased, however, current will flow from the generator to the battery and translating devices until the maximum current is reached and then by properly adjusting the spring 11, the solenoid 8 may be caused to 'draw the core 12 downwardly so as to increase the resistance 9 and prevent any further rise in voltage upon increase in speed of the generator. The current rising gradually from zero to its desired maximum will cause the core 25 to be drawn downwardly by the solenoid 7 against the action of spring 23 if the same be properly adjusted, and the pawl 26 will move around the periphery of the ratchet 20 without engaging the teeth thereof, and the ratchet, therefore, will receive no motion and will remain in the position shown in the drawing and the lever 16 will remain upon the blank segment 17 and there will be no current through the solenoid 13. If, however, sudden changes inload take place as, for example, should .the belt driving the generator slip and cause the output to vary rapidly from little to a considerable output, as such intermittent slipping, whichis apt to take place in this type of system, will cause the speed of the generator to rise and fall very rapidly and thus cause the output thereof to surge, the core 25 would be drawn upwardly and downwardly with considerable rapidity and the inertia of the ball 29 "will cause the pawl 26 to be thrown into engagement with the ratchet 21 in a wellknown manner and pulsations of the core 25 with the pawl 26 thus engaging the ratchet will move the lever 16 in a left-handed direction in such manner as to cut in the solenoid 13 through a high resistance and then gradually decrease the same as long as the pulsation continues. This cutting in of the solenoid 13 and increasing of the strength thereof cuts down the current necessary in the coil 8 in order to overcome the spring 11 and, therefore, the total generator output for which this regulator is adjusted is lessened and the load upon the generator therefore lessened. This lessening of the load will overcome the slipping of the belt and when this point is reached there will be no more pulsating of the core 25 and the resistance 18 then in circuit will remain unaltered unless further slipping and surging take place. This adjustment-will remain until the belt is properly tightened and then the lever 16 may be reset to the position shown in the drawing.

I do not wish in any way to limit myself to the exact details of construction or exact mode of operation set forth in the accompanying drawing and specification which are given merely to illustrate one type of system embodying the essentials of my in vention which is as set forth in the following claims.

1. The combination of a generator, automatic regulating means therefor, and means for producing additional effects in the operation of said regulating means only upon intermittent effects in the performance of the generator.

2. The combination of a generator, automatic means for regulating the same, and means for additionally affecting the regulating means only in response to intermittent abnormal operation of the generator.

3. The combination of a generator, automatic means for controlling the same, electromagnetic means for operating said controlling means, and means for additionally affecting the controlling means only in response to fluctuations in the generator out- 4. The combination with a generator havto fluctuations in current output, and means for affecting said controlling means affected by alterations in generator current.

5. The combination with a generator and an automatic regulator therefor, of means for adjusting the operation of said regulator to increase the effect thereof depending only \upon intermittent fluctuations in generator output.

6. The combination of a generator and automatic means for regulating its output, with automatic means for limiting the output operated in response only to intermittent action of the generator.

7. The combination with a generator, of means for regulating the same and means for adjusting the regulatingmeans only in response to sudden surging in generator outp 8. The combination with a generator and automatic means for regulating the same, of electromagnetic means for affecting the regulating means and electromagnetic means controlling the first named electromagnetic means in response only to intermittent fluctuations in generator output.

9. The combination with a generator and a regulator therefor, of electromagnetic means affecting said regulator and electro magnetic means for altering the current therein in response only to intermittent variations in generator output.

10. The combination with a generator and a regulator therefor responsive to current fluctuations, a coil affecting said regulator, means for controlling the action of said coil comprehending a rheostat and electromagnetic means for operating the same responsive to intermittent variations in generator output.

11. The combination with a generator, a regulator therefor including means for operating the regulator, other means for afi'ecting the operation of the regulator to increase the effect thereof, and means for causing the second-named operating means to become active only upon the occurrence of rapid fluctuations in the generator output.

JOHN L. CREVELING.

Witnesses:

M. HERsKovrrz, ANNA MARIE WALL. 

